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package org.glassfish.jersey.servlet.async;
import java.util.concurrent.atomic.AtomicReference;
import javax.servlet.AsyncContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.glassfish.jersey.servlet.spi.AsyncContextDelegate;
import org.glassfish.jersey.servlet.spi.AsyncContextDelegateProvider;
/**
* Servlet 3.x container response writer async extension and related extension factory implementation.
*
* @author Jakub Podlesak (jakub.podlesak at oracle.com)
* @author Marek Potociar (marek.potociar at oracle.com)
*/
public class AsyncContextDelegateProviderImpl implements AsyncContextDelegateProvider {
@Override
public final AsyncContextDelegate createDelegate(final HttpServletRequest request, final HttpServletResponse response) {
return new ExtensionImpl(request, response);
}
private static final class ExtensionImpl implements AsyncContextDelegate {
private static final int NEVER_TIMEOUT_VALUE = -1;
private final HttpServletRequest request;
private final HttpServletResponse response;
private final AtomicReference<AsyncContext> asyncContextRef;
/**
* Create a Servlet 3.x {@link AsyncContextDelegate} with given {@code request} and {@code response}.
*
* @param request request to create {@link AsyncContext} for.
* @param response response to create {@link AsyncContext} for.
*/
private ExtensionImpl(final HttpServletRequest request, final HttpServletResponse response) {
this.request = request;
this.response = response;
this.asyncContextRef = new AtomicReference<AsyncContext>();
}
@Override
public void suspend() throws IllegalStateException {
final AsyncContext asyncContext = request.startAsync(request, response);
// Tell underlying asyncContext to never time out.
asyncContext.setTimeout(NEVER_TIMEOUT_VALUE);
asyncContextRef.set(asyncContext);
}
@Override
public void complete() {
final AsyncContext asyncContext = asyncContextRef.getAndSet(null);
if (asyncContext != null) {
asyncContext.complete();
}
}
}
}